CV 21 then UA 1839 at O'Hare
Anchorage → Chicago → Des Moines
Timetable, Chicago time
22:27CV 21 from Anchorage at the gate
20:25UA 1839 to Des Moines leaves the gate
21 h 58 apart on the timetable, overnight
UA 1839 leaves 21 h 58 after CV 21 arrives on the timetable: more than half a day, so not a connection we count.